Lock



Jan. 18, 1938.

M. H. ETSTEN 2,105,590

LOCK

Filed March 19, 1936 2 Sheets-Sheet 1 \mzm M. H. ETSTEN Jan.'l8, 1938.

LOCK

Filed March 19, 1936 2 Sheets-Sheet 2 7/70/77-11 EtJZerz,

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Patented Jan. 18, 1938 UNITED STATES PATENT OFFICE LOOK Application March 19, 1936, Serial No. 69,656

3 Claims.

This invention relates to a device for locking doors, the covers of a book, as for example a ledger, or to serve as a substitute for a padlock, etc.

The principal objects of the invention are to provide a lock with one or more inserted headed bolts which, when pushed into the proper place, can be simultaneously locked in place by the turning of the lock plug through any desired arc to prevent the bolt or bolts from being moved; to provide a construction in which the ledger or door cannot be opened except by the party who has the proper key, and to provide a construction in which the lock can be unlocked simply by inserting the key and turning it a quarter turn, for example, thus releasing the bolt or bolts.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the drawings, in which Fig. l is a sectional view of the two covers of a ledger showing the locking bolts and a preferred form of the lock in position holding them locked;

Fig. 2 is an end view of the look as indicated by the arrow 2 in Fig. 1;

Fig. 3 is an opposite end view of the look as indicated by the arrow 3 in Fig. 1;

Fig. 4 is a sectional view of the the bolts in locked position;

Fig. 5 is a similar view showing the bolts in unlocked position;

Fig. 6 is a longitudinal central sectional view of the lock showing it in locked position with the key removed;

Fig. 7 is a similar sectional view showing the unit in locked position with the key inserted so that it is ready to be unlocked by a quarter revolution of the key;

Fig. 8 is a sectional view on the line 88 of Fig. 6;

Fig. 9 is a similar View slightly at one side thereof;

Fig. 10 is a, face view of the end of the lock plug;

Fig. 11 is a side view of the plug holding tumbler, and

Fig. 12 is an edge View thereof.

In the formshown two ledger covers II] are illustrated each having an opening therethrough through which extends a locking bolt I I. The two locking bolt's substantially meet at the center of the ledger and each is provided on the end with a cylindrical head l2. The ledger can be locked when these two heads are pushed into contact with each other. The two bolts support from the cover It a lock cylinder 13 which is perforated at accompanying lock, showing diametrically opposite points to receive the bolts which fit it accurately. In Fig. 5 is shown the position in which the ledger is unlocked and the covers can be removed. To look the ledger, the two bolts are moved toward each other so that the two heads !2 contact, or nearly contact, with each other as shown in Fig. 4.

The cylinder l3 includes a plug I4 which is provided with a projecting tumbler l5 operating in a groove H5 in the inside of the cylinder. At one end it is connected with a longitudinal slot i1 extending along the cylinder. The plug is provided with the usual tumblers H) which are adapted to be manipulated by a key 20 as shown in Fig. '7. This key, when inserted, will move these tumblers to withdraw them so that the plug can be turned by the key and at the same time the tumbler l5 will be turned with it in the groove l6, thus preventing the removal of the plug. The key and plug are turned only a quarter of a revolution preferably. The plug is provided with two projections 2| spaced apart which, as shown in Fig. 4, will move around opposite sides of the two heads l2 and hold the bolts ll locked together as shown in Fig. 4. These projections 2| can be used for looking a single bolt and head, evidently. The key at this point can be removed and the lock can be unlocked again by inserting the key and turning it back a quarter of a revolution. This, as shown in Fig. 5, releases the heads l2 and allows the bolts to be drawn away from each other allowing the ledger, door, or the like, to be opened.

This constitutes a very simple Way of looking a book, employing only one look and one key, the 3 look being located in a place in the book where it is not objectionable and is an improved feature of the book when the lock is used for that purpose.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:

l. The combination of two bolts in axial alignment, and each having a transverse head at the inner end in axial alignment with the bolts, the bolts being movable to place the heads in position for enabling the bolts to be locked together, and a lock having means for locking said heads in contact with each other.

2. The combination of two bolts projecting oppositely, and a cylindrical head on the inner end of each bolt, of a lock cylinder into which said bolts are projectible, a plug in the cylinder having two projections substantially engaging stantially meet midway between said covers, and a head on the inner end of each bolt, of a lock cylinder into which said two bolts are projectible, and a plug in the cylinder having two projections substantially engageable with said heads to lock 5 them together or to release them.

MORRIS H. ETSTEN. 

